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Dysrhythmia ECG
cardiac dysrhythmia on ECG
23
Medical
Professional
11/10/2010

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Cards

Term
Normal Sinus Rhythm
Definition
upright P-wave in Lead II
PR 0.12-0.20s rate=60-100
Term
Junctional Rhythm (escape)
Definition
AV node conducts retrograde
inverted P following QRS rate=45-60
Term
First degree AV Block
Definition
All P waves produce a QRS
PR is too long >0.20
Term
Second Degree AV block
Definition
Some P waves not followed by QRS
Term
Types of 2nd degree AV block
Definition
Wenckebach (Mobitz I)
Mobitz II
2:1 AV block
Term
Requirements for Reentry
Definition
2 pthw with different electric behavio
Unidirectional block
Slow conduction
Term
Wenckebach (Mobitz I)
site of block? pattern?
Definition
PRogressive, PRolonged, PR segment then drop P; block @ AV node; grouped beats
Term
Mobitz II
location of block? pattern
Definition
Constant PR for conducted beats; Wide QRS; dropped P; block @ His-purkinje
Term
2:1 AV block
Definition
alternating pattern of dropped and conducted P- waves; P=2x QRS
Narrow QRS: suggest Wenckebach
Wide QRS: suggests Mobitz II
Term
3rd degree AV block
Definition
Complete block; Independent ventricular & atria rhythms;
Junctional escape: narrow QRS
Ventricular escape: wide QRS
Term
Pacemaker Shock on ECG
Definition
sharp narrow spike preceeding P(atrium) or QRS(ventricle)
Term
Tachycardia
Definition
>100 bpm; sinus tachy is most common
junctional tachy
Term
Premature atrial complex
Definition
early P-wave(rounder top)different in shape from sinus P-waves;
Term
Premature Ventricular Complex
Definition
early QRS diff in shape from nl QRS;
No early different P-wave
PVC is large/wide;
T-wave in opposite direction
Term
AV nodal reentrant tachycardia AVNRT
Definition
paroxysmal arrhythmia
normal/narrow QRS; rapid onset
P-wave(retro)buried in QRS-->distortion
Term
AVNRT
Clinical: trt acute: Trt chronic
Definition
most common in young(lesser sex) females
acute:carotid massg, valsalva, adenosine
chronic: Meds (B-block & CaC block)
Radiofreq ablation->slow pathw
Term
Atrial Flutter
Definition
Sawtooth (II,III,aVF) distortion are ST or T-wave segments; 2:1 or 4:1 conduction
organized reentry @ 250-350 rate;
Term
Atrial Fibrillation
Definition
chaotic inconsistent reentry
small rapid undulations w/o pattern (V1)
Ventricular rate: irregularly irregular
Term
A Fib and A Flutter Trt
Definition
Rate: B-blocker, Ca-blocker, negative dromotropic drugs (AV depressents)
Rhythm: Cardioversion or anti-arrhthmic
Aggr Rhythm: radiofreq abl (flutter)
Term
Wolff-Parkinson-White syndrome
Definition
rentry in accessory path; fusion beat;
supraventric tachy
Abnormal ECG: short PR, Wide QRS, delta wave(slurred upstroke of QRS)
Dangerous bc it can transmit A fib
Term
AVRT
Definition
down AV node, up access pthw
similar trt to AVNRT
Term
Ventricular tachycardia
Definition
stable: monomorphic: structural (scar)
unstable: polymorph:nl QT, irreg QRS
Polymorph: long QT: torsade de pointes
some point up/down
Term
Ventricular fibrillation
Definition
Most dangerous form of arrhythmia
unstable multiple reentrant circuits
Immediate CPR followed by defibrillation
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